JP5093319B2 - Hybrid car - Google Patents

Abstract

In a hybrid vehicle, control is executed to operate an engine with fuel injection being performed, when an unexecuted percentage of catalyst degradation suppression control is equal to or greater than a threshold value of the unexecuted percentage, when a power storage percentage of a battery is equal to or greater than a threshold value of the power storage percentage and the battery is charging, and also when a vehicle speed is equal to or greater than a threshold value of the vehicle speed and a cumulative air amount is equal to or greater than a threshold value of the cumulative air amount, when a catalyst temperature is less than a first threshold temperature and equal to or greater than a second threshold temperature, when the catalyst temperature is equal to or greater than the first threshold temperature, when there is a braking request while the engine is operating.

Description

  The present invention relates to a hybrid vehicle, and more specifically, an internal combustion engine capable of outputting traveling power by a purification device having a purification catalyst for purifying exhaust, and an electric motor capable of inputting / outputting traveling power. The present invention relates to a hybrid vehicle including an electric motor and a secondary battery capable of exchanging electric power.

  Conventionally, this type of hybrid vehicle includes an engine in which a catalyst for purifying exhaust gas is provided in an exhaust passage, a first motor / generator, and power connected to the engine, the first motor / generator, and a drive shaft. A distribution mechanism; a second motor / generator connected to the drive shaft; and a battery for exchanging electric power with the first motor / generator and the second motor / generator. On condition that the temperature is higher than a temperature threshold (for example, a temperature at which the degree of deterioration of the catalyst deteriorates), the fuel supply valve of the engine is controlled so as not to cut the fuel, and the supply air amount supplied to the engine is an air amount threshold (for example, The engine torque becomes negative from the positive torque as the engine charge becomes larger and the battery charge is larger. It controls the throttle valve of the engine to shift to click has been proposed (e.g., see Patent Document 1). In this hybrid vehicle, when the temperature of the catalyst is higher than the temperature threshold value and the charge amount of the battery is higher than the charge amount threshold value, the fuel supply valve of the engine is controlled so as not to cut the fuel, and the supply air amount supplied to the engine is air. By controlling the throttle valve of the engine so as to be larger than the quantity threshold value and the engine torque becomes a negative torque, the deterioration of the catalyst is suppressed and the battery is prevented from being overcharged.

JP 2009-262677 A

  In the above-described hybrid vehicle, when the catalyst temperature is higher than the temperature threshold when the vehicle is decelerating, the fuel supply valve is controlled so as not to cut the fuel. In order to further suppress the promotion of deterioration, it is preferable to secure more opportunities for such control.

  The main purpose of the hybrid vehicle of the present invention is to further suppress the promotion of deterioration of the purification catalyst of the purification device.

  The hybrid vehicle of the present invention employs the following means in order to achieve the main object described above.

The first hybrid vehicle of the present invention is
A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature that is lower than the first predetermined temperature and lower than the first predetermined temperature, and is stored in the secondary battery. When the power storage ratio, which is the ratio of the power storage amount to the total capacity, is equal to or greater than a predetermined power storage ratio, a catalyst deterioration suppression control is performed to control the internal combustion engine to be operated by fuel injection, and the electric motor About the predetermined braking request time control means for executing the regenerative drive control for controlling the regenerative drive,
It is a summary to provide.

  In the first hybrid vehicle of the present invention, the temperature of the purification catalyst is assumed to accelerate the deterioration of the purification catalyst when the braking request is made while the internal combustion engine is running and the vehicle is running. When the temperature is equal to or higher than a first predetermined temperature determined as the lower limit of the temperature range and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature determined as a temperature lower than the first predetermined temperature but lower than the first predetermined temperature, When the power storage ratio, which is the ratio of the stored power storage amount to the total capacity, is equal to or greater than a predetermined power storage ratio, a catalyst deterioration suppression control is performed to control the internal combustion engine to be operated by fuel injection. Then, regenerative drive control is performed to control the electric motor so that it is regeneratively driven. That is, at the time of the predetermined braking request, for the internal combustion engine, in addition to when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, the temperature of the purification catalyst is lower than the first predetermined temperature and higher than the second predetermined temperature and the secondary battery. Even when the power storage ratio is equal to or higher than the predetermined power storage ratio, the catalyst deterioration suppression control is executed. Thereby, the opportunity to perform catalyst deterioration suppression control can be increased, and it can suppress more that deterioration of a purification catalyst is accelerated | stimulated. Of course, the braking force can be applied to the vehicle by executing the regenerative drive control for the electric motor. Here, the “predetermined power storage ratio” can be a power storage ratio of a predetermined ratio with respect to the full charge, or can be a power storage ratio that is smaller than the full charge by a predetermined value.

  In the first hybrid vehicle of the present invention, the predetermined braking request time control means is configured such that when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, the storage ratio of the secondary battery is Means for executing the catalyst deterioration suppression control for the internal combustion engine and executing the regenerative drive control for the electric motor when the secondary battery is charged while being equal to or greater than the predetermined power storage ratio It can also be.

  Further, in the first hybrid vehicle of the present invention, the predetermined braking request time control means makes a main request for executing the catalyst deterioration suppression control when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature. When the temperature of the purification catalyst is lower than the first predetermined temperature and higher than the second predetermined temperature, it is determined that a temporary request for execution of the catalyst deterioration suppression control is made, and the catalyst deterioration suppression control is performed. When the actual request for execution is made and when the provisional request for execution of the catalyst deterioration suppression control is made and the storage ratio of the secondary battery is equal to or higher than the predetermined storage ratio, the catalyst deterioration is performed for the internal combustion engine. The suppression control is executed, and the electric motor may be a means for executing the regenerative drive control.

  Further, in the first hybrid vehicle of the present invention, the predetermined braking request time control means is configured such that when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, When the temperature of the purifying catalyst is set to a temperature rising running state that is likely to rise above the first predetermined temperature, the catalyst deterioration suppression control is performed for the internal combustion engine regardless of the storage ratio of the secondary battery. It is possible to execute the regenerative drive control with respect to the electric motor. By doing so, it is possible to increase the opportunities for executing the catalyst deterioration suppression control. In this case, the temperature-increasing running state is such that the vehicle speed is equal to or higher than a predetermined vehicle speed and an integrated air amount that is an integrated value of the air amount supplied to the internal combustion engine is equal to or higher than a predetermined air amount. It can also be a state.

  Alternatively, in the first hybrid vehicle of the present invention, the predetermined braking request time control means determines that the execution request for the catalyst deterioration suppression control is made when the temperature of the purification catalyst is equal to or higher than the second predetermined temperature. When the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, the catalyst deterioration suppression control is not executed even though the execution request for the catalyst deterioration suppression control is made. When the non-executed degree, which is a predetermined level, is equal to or higher than a predetermined level, the catalyst deterioration suppression control is executed for the internal combustion engine and the regenerative drive is performed for the electric motor regardless of the storage ratio of the secondary battery. It can also be a means for executing control. By doing so, it is possible to increase the opportunities for executing the catalyst deterioration suppression control. In this case, the unexecuted degree is at least one of the time, the ratio, and the number of times that the catalyst deterioration suppression control is not executed despite the execution request of the catalyst deterioration suppression control being made. You can also.

The second hybrid vehicle of the present invention is
A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature that is lower than the first predetermined temperature and lower than the first predetermined temperature, and is stored in the secondary battery. When the power storage ratio, which is the ratio of the power storage amount to the total capacity, is greater than or equal to a predetermined power storage ratio, the internal combustion engine is operated by fuel injection rather than catalyst odor suppression control that controls the fuel injection to be stopped. Predetermined braking request control means for preferentially executing catalyst deterioration suppression control to be controlled and executing regenerative drive control for controlling the motor to be regeneratively driven,
It is a summary to provide.

  In the second hybrid vehicle of the present invention, the temperature of the purification catalyst is assumed to accelerate the deterioration of the purification catalyst when the braking request is made while the internal combustion engine is running and the vehicle is running. When the temperature is equal to or higher than a first predetermined temperature determined as the lower limit of the temperature range and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature determined as a temperature lower than the first predetermined temperature but lower than the first predetermined temperature, When the power storage ratio, which is the ratio of the stored power storage amount to the total capacity, is equal to or greater than a predetermined power storage ratio, fuel injection is performed rather than catalyst odor suppression control for controlling the fuel injection to be stopped for the internal combustion engine. The catalyst deterioration suppression control for controlling the motor to be operated is given priority, and the regenerative drive control for controlling the motor to be regeneratively driven is performed. That is, at the time of the predetermined braking request, for the internal combustion engine, in addition to when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, the temperature of the purification catalyst is lower than the first predetermined temperature and higher than the second predetermined temperature and the secondary battery. Even when the power storage ratio is equal to or higher than the predetermined power storage ratio, the catalyst deterioration suppression control is prioritized and executed over the catalyst odor suppression control. Thereby, the opportunity to perform catalyst deterioration suppression control can be increased, and it can suppress more that deterioration of a purification catalyst is accelerated | stimulated. Of course, the braking force can be applied to the vehicle by executing the regenerative drive control for the electric motor. Here, the “predetermined power storage ratio” can be a power storage ratio of a predetermined ratio with respect to the full charge, or can be a power storage ratio that is smaller than the full charge by a predetermined value.

  In the second hybrid vehicle of the present invention, the predetermined braking request time control means is configured such that the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is less than the first predetermined temperature. The internal combustion engine is in the internal combustion engine when the charge ratio of the secondary battery is equal to or higher than the predetermined charge ratio when the catalyst odor generation condition is assumed to be higher than the second predetermined temperature and the generation of the catalyst odor of the purification catalyst is satisfied. The engine deterioration control may be executed for the engine, and the regenerative drive control may be executed for the electric motor.

  In the second hybrid vehicle of the present invention, the catalyst odor suppression control may be control for controlling the fuel injection to be stopped and the amount of air supplied to the internal combustion engine to be increased. .

The third hybrid vehicle of the present invention is
A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and higher than a second predetermined temperature set as a temperature lower than the first predetermined temperature, the current running state is Performing a catalyst deterioration suppression control for controlling the internal combustion engine to be operated by fuel injection when the temperature rise running state is set as a running state in which the temperature is likely to rise above the first predetermined temperature; Predetermined braking request time control means for executing regenerative drive control for controlling the motor to be regeneratively driven;
It is a summary to provide.

  In the third hybrid vehicle of the present invention, the temperature of the purification catalyst is assumed to accelerate the deterioration of the purification catalyst when the braking request is made while the internal combustion engine is running. When the temperature is equal to or higher than a first predetermined temperature defined as the lower limit of the temperature range, and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature defined as a temperature lower than the first predetermined temperature but lower than the first predetermined temperature, and the current running state However, when the temperature of the purifying catalyst is set to a traveling state in which the temperature of the purifying catalyst is likely to rise above the first predetermined temperature, the catalyst deterioration suppression control is performed to control the internal combustion engine so that the fuel injection is performed. And about the electric motor, the regenerative drive control which controls so that it is regeneratively driven is performed. That is, at the time of the predetermined braking request, for the internal combustion engine, in addition to when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, the temperature of the purification catalyst is lower than the first predetermined temperature and higher than or equal to the second predetermined temperature and Even when the state is the temperature rising running state, the catalyst deterioration suppression control is executed. Thereby, the opportunity to perform catalyst deterioration suppression control can be increased, and it can suppress more that deterioration of a purification catalyst is accelerated | stimulated. Of course, the braking force can be applied to the vehicle by executing the regenerative drive control for the electric motor. Here, the “temperature rise running state” means that the vehicle speed is equal to or higher than a predetermined vehicle speed, and the integrated air amount that is an integrated value of the air amount supplied to the internal combustion engine is equal to or higher than a predetermined air amount. It can also be a state.

  In such a third hybrid vehicle of the present invention, the predetermined braking request time control means determines that the execution request for the catalyst deterioration suppression control is made when the temperature of the purification catalyst is equal to or higher than the second predetermined temperature. When the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, the catalyst deterioration suppression control is not executed even though the execution request for the catalyst deterioration suppression control is made. When the unexecuted degree, which is the degree, is equal to or greater than a predetermined predetermined level, the catalyst deterioration suppression control is executed for the internal combustion engine and the regenerative drive control is executed for the electric motor regardless of the current running state. It can also be a means. In this case, the unexecuted degree is at least one of the time, the ratio, and the number of times that the catalyst deterioration suppression control is not executed despite the execution request of the catalyst deterioration suppression control being made. You can also.

The fourth hybrid vehicle of the present invention is
A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and higher than a second predetermined temperature set as a temperature lower than the first predetermined temperature, the current running state is In a temperature rising running state determined as a running state in which the temperature is likely to rise above the first predetermined temperature, fuel injection is performed rather than catalyst odor suppression control for controlling the fuel injection to be stopped for the internal combustion engine. Priority is given to catalyst deterioration suppression control for controlling the motor to be operated, and for the electric motor, a control operation at the time of a predetermined braking request for executing regenerative drive control for controlling the motor to be regeneratively driven is performed. ,
It is a summary to provide.

  In the fourth hybrid vehicle of the present invention, the temperature of the purification catalyst is assumed to accelerate the deterioration of the purification catalyst when the braking request is made while the internal combustion engine is running and the vehicle is running. When the temperature is equal to or higher than a first predetermined temperature defined as the lower limit of the temperature range, and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature defined as a temperature lower than the first predetermined temperature but lower than the first predetermined temperature, and the current running state However, when the temperature of the purifying catalyst is set to a traveling state in which the temperature of the purifying catalyst is likely to rise above the first predetermined temperature, the fuel injection is performed rather than the catalyst odor suppression control for controlling the fuel injection to be stopped for the internal combustion engine. The catalyst deterioration suppression control that is performed so as to be operated is preferentially executed, and the regenerative drive control that controls the motor to be regeneratively driven is executed. That is, at the time of the predetermined braking request, for the internal combustion engine, in addition to when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, the temperature of the purification catalyst is lower than the first predetermined temperature and higher than or equal to the second predetermined temperature and Even when the state is the temperature rise running state, the catalyst deterioration suppression control is executed with priority over the catalyst odor suppression control. Thereby, the opportunity to perform catalyst deterioration suppression control can be increased, and it can suppress more that deterioration of a purification catalyst is accelerated | stimulated. Of course, the braking force can be applied to the vehicle by executing the regenerative drive control for the electric motor. Here, the “temperature rise running state” means that the vehicle speed is equal to or higher than a predetermined vehicle speed, and the integrated air amount that is an integrated value of the air amount supplied to the internal combustion engine is equal to or higher than a predetermined air amount. It can also be a state. Further, the “catalyst odor suppression control” may be control for controlling the fuel injection to be stopped and the amount of air supplied to the internal combustion engine to be increased.

  In the fourth hybrid vehicle of the present invention, the predetermined braking request time control means is configured such that the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is less than the first predetermined temperature. When the current traveling state is the above-mentioned temperature-increased traveling state when the catalyst odor generating condition that is higher than the second predetermined temperature and the generation of the catalytic odor of the purification catalyst is established, the internal combustion engine is The catalyst deterioration suppression control may be executed, and the electric motor may be a means for executing the regenerative drive control.

The fifth hybrid vehicle of the present invention is
A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
When the predetermined braking request is made while the internal combustion engine is running while the engine is running, the temperature of the purification catalyst is set as a lower limit of a temperature range in which promotion of deterioration of the purification catalyst is assumed. 1 When the internal combustion engine is at or above a second predetermined temperature set as a temperature lower than a predetermined temperature, it is determined that a request for execution of catalyst deterioration suppression control for controlling the internal combustion engine to be operated by fuel injection is made. When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, and the execution request for the catalyst deterioration suppression control is made. Nevertheless, the catalyst deterioration suppression control is executed for the internal combustion engine when the unexecuted level, which is the level at which the catalyst deterioration suppression control is not executed, is equal to or greater than a predetermined level. , Predetermined braking demand control means for performing the regenerative drive control for controlling so as to be regenerated drive for the electric motor,
It is a summary to provide.

  In the fifth hybrid vehicle of the present invention, the temperature of the purifying catalyst is assumed to be a temperature at which promotion of deterioration of the purifying catalyst is expected at the time of a predetermined braking request when the braking request is made while the internal combustion engine is running. When the internal combustion engine is at or above a second predetermined temperature that is lower than a first predetermined temperature that is set as the lower limit of the range, there is an execution request for catalyst deterioration suppression control that controls the internal combustion engine to be operated by fuel injection. When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, the catalyst deterioration suppression control is requested to be executed. However, when the degree of non-execution, which is the degree to which the catalyst deterioration suppression control has not been executed for the internal combustion engine, is equal to or greater than a predetermined level, the catalyst deterioration suppression is performed for the internal combustion engine. Run the control, for the motor executes regenerative drive control for controlling so regenerated driven. That is, at the time of the predetermined braking request, for the internal combustion engine, in addition to when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, the temperature of the purification catalyst is less than the first predetermined temperature and equal to or higher than the second predetermined temperature and is not yet executed. The catalyst deterioration suppression control is also executed when the value is equal to or greater than a predetermined level. Thereby, the opportunity to perform catalyst deterioration suppression control can be increased, and it can suppress more that deterioration of a purification catalyst is accelerated | stimulated. Of course, the braking force can be applied to the vehicle by executing the regenerative drive control for the electric motor. Here, “not yet executed” is at least one of the time, rate, and number of times that the catalyst deterioration suppression control is not executed for the internal combustion engine even though the execution request of the catalyst deterioration suppression control is made. It can also be.

The sixth hybrid vehicle of the present invention is
A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
When the predetermined braking request is made while the internal combustion engine is running while the engine is running, the temperature of the purification catalyst is set as a lower limit of a temperature range in which promotion of deterioration of the purification catalyst is assumed. 1 When the internal combustion engine is at or above a second predetermined temperature set as a temperature lower than a predetermined temperature, it is determined that a request for execution of catalyst deterioration suppression control for controlling the internal combustion engine to be operated by fuel injection is made. When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, and the execution request for the catalyst deterioration suppression control is made. Nevertheless, when the non-executed level, which is the level at which the catalyst deterioration suppression control has not been executed, is equal to or greater than a predetermined level, the fuel injection is controlled to be stopped for the internal combustion engine. Predetermined braking request for performing catalyst deterioration suppression control for controlling operation so that fuel injection is performed over the catalyst odor suppression control for performing regenerative drive control for controlling the motor to be regeneratively driven Time control means,
It is a summary to provide.

  In the sixth hybrid vehicle of the present invention, the temperature of the purifying catalyst is assumed to be a temperature at which promotion of deterioration of the purifying catalyst is expected at the time of a predetermined braking request when the braking request is made while the internal combustion engine is running. When the internal combustion engine is at or above a second predetermined temperature that is lower than a first predetermined temperature that is set as the lower limit of the range, there is an execution request for catalyst deterioration suppression control that controls the internal combustion engine to be operated by fuel injection. When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, the catalyst deterioration suppression control is requested to be executed. However, when the non-execution level, which is the level at which the catalyst deterioration suppression control is not executed for the internal combustion engine, is equal to or greater than a predetermined level, fuel injection is performed for the internal combustion engine. Priority is given to catalyst deterioration suppression control that controls operation so that fuel injection is performed over catalyst odor suppression control that controls the motor to be stopped, and regenerative drive control that controls the motor to be regeneratively driven To do. That is, at the time of the predetermined braking request, for the internal combustion engine, in addition to when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, the temperature of the purification catalyst is less than the first predetermined temperature and equal to or higher than the second predetermined temperature and is not yet executed. Even when the value is equal to or greater than a predetermined level, the catalyst deterioration suppression control is executed with priority over the catalyst odor suppression control. Thereby, the opportunity to perform catalyst deterioration suppression control can be increased, and it can suppress more that deterioration of a purification catalyst is accelerated | stimulated. Of course, the braking force can be applied to the vehicle by executing the regenerative drive control for the electric motor. Here, “not yet executed” is at least one of the time, rate, and number of times that the catalyst deterioration suppression control is not executed for the internal combustion engine even though the execution request of the catalyst deterioration suppression control is made. It can also be. Further, the “catalyst odor suppression control” may be control for controlling the fuel injection to be stopped and the amount of air supplied to the internal combustion engine to be increased.

  In the sixth hybrid vehicle of the present invention, the predetermined braking request time control means is configured such that the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is less than the first predetermined temperature. When the catalyst odor generation condition where the generation of the catalyst odor of the purification catalyst is assumed, and when the unexecuted level is equal to or higher than the predetermined level, the internal combustion engine is Catalyst deterioration suppression control may be executed, and the electric motor may be a means for executing the regenerative drive control.

  The hybrid vehicle according to any one of the first to sixth aspects of the present invention includes a second electric motor capable of exchanging electric power with the secondary battery and outputting torque for adjusting the rotational speed of the internal combustion engine, The predetermined braking request time control means controls the second electric motor so that the rotational speed of the internal combustion engine is adjusted when the catalyst deterioration suppression control is executed for the internal combustion engine, and the secondary battery is fully charged. In some cases, the internal combustion engine may be a unit that does not execute the catalyst deterioration suppression control and controls the second electric motor so that torque is not output. In this way, the secondary battery can be protected when the secondary battery is fully charged.

1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 as a first embodiment of the present invention. 2 is a configuration diagram showing an outline of the configuration of an engine 22. FIG. 4 is a flowchart showing an example of a predetermined braking request time control routine executed by a hybrid electronic control unit 70; It is explanatory drawing which shows an example of the map for request | requirement braking torque setting. A common explanation for mechanically explaining the rotating elements of the power distribution and integration mechanism 30 when torque is not output from the motor MG1 and braking force is not output from the hydraulic brake and regenerative torque is output from the motor MG2. It is explanatory drawing which shows an example of a diagram. 4 is a flowchart showing an example of a predetermined braking request time control routine executed by a hybrid electronic control unit 70; 7 is a flowchart showing an example of a priority setting routine executed by the hybrid electronic control unit 70. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 120 according to a modification. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 220 of a modified example. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 320 of a modified example.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 as a first embodiment of the present invention. As shown in the figure, the hybrid vehicle 20 of the first embodiment includes an engine 22, a three-shaft power distribution and integration mechanism 30 connected to a crankshaft 26 as an output shaft of the engine 22 via a damper 28, A motor MG1 capable of generating electricity connected to the distribution integration mechanism 30, a reduction gear 35 attached to a ring gear shaft 32a as a drive shaft connected to the power distribution integration mechanism 30, and a motor MG2 connected to the reduction gear 35 A brake actuator 92 for controlling the brakes of the drive wheels 63a and 63b and driven wheels (not shown) (hereinafter sometimes collectively referred to as wheels), and a hybrid electronic control unit 70 for controlling the entire vehicle. .

  The engine 22 is configured as an internal combustion engine capable of outputting power using a hydrocarbon-based fuel such as gasoline or light oil, and the air purified by an air cleaner 122 is passed through a throttle valve 124 as shown in FIG. Inhalation and gasoline are injected from the fuel injection valve 126 to mix the sucked air and gasoline, and this mixture is sucked into the combustion chamber through the intake valve 128 and explosively burned by an electric spark from the spark plug 130. Thus, the reciprocating motion of the piston 132 pushed down by the energy is converted into the rotational motion of the crankshaft 26. Exhaust gas from the engine 22 is sent to the outside air through a purification device 134 having a purification catalyst (three-way catalyst) 134a that purifies harmful components such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx). Discharged.

  The engine 22 is controlled by an engine electronic control unit (hereinafter referred to as an engine ECU) 24. The engine ECU 24 is configured as a microprocessor centered on the CPU 24a, and includes a ROM 24b that stores a processing program, a RAM 24c that temporarily stores data, an input / output port and a communication port (not shown), in addition to the CPU 24a. . The engine ECU 24 receives signals from various sensors that detect the state of the engine 22, for example, a crank position from the crank position sensor 140 that detects the rotational position of the crankshaft 26, and a water temperature that detects the temperature of cooling water in the engine 22. The cam position for detecting the coolant temperature Tw from the sensor 142, the in-cylinder pressure from a pressure sensor (not shown) attached to the combustion chamber, the rotational position of the intake valve 128 for intake and exhaust to the combustion chamber and the camshaft for opening and closing the exhaust valve The cam position from the sensor 144, the throttle position from the throttle valve position sensor 146 for detecting the position of the throttle valve 124, the intake air amount Qa from the air flow meter 148 attached to the intake pipe, and the temperature sensor also attached to the intake pipe The intake air temperature Tin from 49, the catalyst temperature Tc from the temperature sensor 134b for detecting the temperature of the purification catalyst 134a, the air-fuel ratio AF from the air-fuel ratio sensor 135a, the oxygen signal Vo from the oxygen sensor 135b, etc. are input via the input port. Has been. The engine ECU 24 also integrates various control signals for driving the engine 22, such as a drive signal to the fuel injection valve 126, a drive signal to the throttle motor 136 that adjusts the position of the throttle valve 124, and an igniter. The control signal to the ignition coil 138 and the control signal to the variable valve timing mechanism 150 that can change the opening / closing timing of the intake valve 128 are output via the output port. The engine ECU 24 is in communication with the hybrid electronic control unit 70, controls the operation of the engine 22 by a control signal from the hybrid electronic control unit 70, and outputs data related to the operation state of the engine 22 as necessary. The engine ECU 24 calculates the rotational speed of the crankshaft 26, that is, the rotational speed Ne of the engine 22 based on the crank position from the crank position sensor 140, and the intake air amount Qa from the air flow meter 148 and the rotational speed of the engine 22. Based on Ne, volume efficiency (ratio of volume of air actually sucked in one cycle to stroke volume per cycle of engine 22) KL is calculated.

  The power distribution and integration mechanism 30 includes an external gear sun gear 31, an internal gear ring gear 32 arranged concentrically with the sun gear 31, a plurality of pinion gears 33 that mesh with the sun gear 31 and mesh with the ring gear 32, A planetary gear mechanism is provided that includes a carrier 34 that holds a plurality of pinion gears 33 so as to rotate and revolve, and that performs differential action using the sun gear 31, the ring gear 32, and the carrier 34 as rotational elements. In the power distribution and integration mechanism 30, the crankshaft 26 of the engine 22 is connected to the carrier 34, the motor MG1 is connected to the sun gear 31, and the reduction gear 35 is connected to the ring gear 32 via the ring gear shaft 32a. When functioning as a generator, power from the engine 22 input from the carrier 34 is distributed according to the gear ratio between the sun gear 31 side and the ring gear 32 side, and when the motor MG1 functions as an electric motor, the engine input from the carrier 34 The power from 22 and the power from the motor MG1 input from the sun gear 31 are integrated and output to the ring gear 32 side. The power output to the ring gear 32 is finally output from the ring gear shaft 32a to the drive wheels 63a and 63b of the vehicle via the gear mechanism 60 and the differential gear 62.

  The motor MG1 and the motor MG2 are both configured as well-known synchronous generator motors that can be driven as generators and can be driven as motors, and exchange power with the battery 50 via inverters 41 and 42. The power line 54 connecting the inverters 41 and 42 and the battery 50 is configured as a positive electrode bus and a negative electrode bus shared by the inverters 41 and 42, and the electric power generated by one of the motors MG1 and MG2 It can be consumed by a motor. Therefore, battery 50 is charged / discharged by electric power generated from one of motors MG1 and MG2 or insufficient electric power. If the balance of electric power is balanced by the motors MG1 and MG2, the battery 50 is not charged / discharged. The motors MG1 and MG2 are both driven and controlled by a motor electronic control unit (hereinafter referred to as a motor ECU) 40. The motor ECU 40 detects signals necessary for driving and controlling the motors MG1 and MG2, such as signals from rotational position detection sensors 43 and 44 that detect the rotational positions of the rotors of the motors MG1 and MG2, and current sensors (not shown). The phase current applied to the motors MG1 and MG2 to be applied is input, and a switching control signal to the inverters 41 and 42 is output from the motor ECU 40. The motor ECU 40 is in communication with the hybrid electronic control unit 70, controls the driving of the motors MG1 and MG2 by a control signal from the hybrid electronic control unit 70, and, if necessary, data on the operating state of the motors MG1 and MG2. Output to the hybrid electronic control unit 70. The motor ECU 40 also calculates the rotational speeds Nm1 and Nm2 of the motors MG1 and MG2 based on signals from the rotational position detection sensors 43 and 44.

  The battery 50 is configured as a lithium ion secondary battery, for example, and is managed by a battery electronic control unit (hereinafter referred to as a battery ECU) 52. The battery ECU 52 receives signals necessary for managing the battery 50, for example, an inter-terminal voltage Vb from the voltage sensor 51 a installed between the terminals of the battery 50, and a power line 54 connected to the output terminal of the battery 50. The charging / discharging current Ib from the attached current sensor 51b (a positive value when discharged from the battery 50), the battery temperature Tb from the temperature sensor 51c attached to the battery 50, and the like are input. Then, data related to the state of the battery 50 is output to the hybrid electronic control unit 70 by communication. Further, the battery ECU 52 is a ratio of the amount of stored electricity stored in the battery 50 based on the integrated value of the charge / discharge current Ib detected by the current sensor 51b in order to manage the battery 50 to the total capacity (storage capacity). The storage ratio SOC is calculated, and the input / output limits Win and Wout, which are the maximum allowable power that may charge / discharge the battery 50, are calculated based on the calculated storage ratio SOC and the battery temperature Tb. The input / output limits Win and Wout of the battery 50 are set to the basic values of the input / output limits Win and Wout based on the battery temperature Tb, and the output limiting correction coefficient and the input limiting limit are set based on the storage ratio SOC of the battery 50. It can be set by setting a correction coefficient and multiplying the basic value of the set input / output limits Win and Wout by the correction coefficient.

  The brake actuator 92 has a braking force corresponding to the brake share in the braking force applied to the vehicle by the pressure (brake pressure) of the brake master cylinder 90 and the vehicle speed V generated when the brake pedal 85 is depressed. The hydraulic pressures of the brake wheel cylinders 96a to 96d are adjusted so as to act on the wheels 63a, 63b and the driven wheels), and the hydraulic pressures of the brake wheel cylinders 96a to 96d are applied so that the braking force acts on the wheels regardless of the depression of the brake pedal 85. It is configured so that it can be adjusted. Hereinafter, the braking force applied to the wheel by the operation of the brake actuator 92 may be referred to as a hydraulic brake. The brake actuator 92 is controlled by a brake electronic control unit (hereinafter referred to as a brake ECU) 94. The brake ECU 94 inputs signals such as a wheel speed from a wheel speed sensor (not shown) attached to the wheels (drive wheels 63a, 63b and driven wheels) and a steering angle from a steering angle sensor (not shown) via a signal line (not shown). Thus, when the driver depresses the brake pedal 85, an anti-lock brake system function (ABS) for preventing any of the driving wheels 63a, 63b and the driven wheels from slipping due to the lock, or the driver depresses the accelerator pedal 83. At this time, traction control (TRC) for preventing any one of the drive wheels 63a and 63b from slipping due to idling, posture holding control (VSC) for holding the posture while the vehicle is turning, etc. are also performed. The brake ECU 94 communicates with the hybrid electronic control unit 70, and controls the drive of the brake actuator 92 by a control signal from the hybrid electronic control unit 70, and the data regarding the state of the brake actuator 92 is used for the hybrid as necessary. Output to the electronic control unit 70.

  The hybrid electronic control unit 70 is configured as a microprocessor centered on the CPU 72, and in addition to the CPU 72, a ROM 74 for storing processing programs, a RAM 76 for temporarily storing data, an input / output port and communication not shown. And a port. The hybrid electronic control unit 70 includes an ignition signal from an ignition switch 80, a shift position SP from a shift position sensor 82 that detects the operation position of the shift lever 81, and an accelerator pedal position sensor 84 that detects the amount of depression of the accelerator pedal 83. The accelerator pedal opening Acc from the vehicle, the brake pedal position BP from the brake pedal position sensor 86 for detecting the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 88, and the like are input via the input port. As described above, the hybrid electronic control unit 70 is connected to the engine ECU 24, the motor ECU 40, the battery ECU 52, and the brake ECU 94 via a communication port, and the engine ECU 24, the motor ECU 40, the battery ECU 52, the brake ECU 94, and various control signals. And exchanging data.

  The hybrid vehicle 20 of the first embodiment configured in this way is the required torque to be output to the ring gear shaft 32a as the drive shaft based on the accelerator opening Acc corresponding to the amount of depression of the accelerator pedal 83 by the driver and the vehicle speed V. The engine 22, the motor MG1, and the motor MG2 are controlled so that the required power corresponding to the required torque is output to the ring gear shaft 32a. As operation control of the engine 22, the motor MG1, and the motor MG2, the operation of the engine 22 is controlled so that power corresponding to the required power is output from the engine 22, and all of the power output from the engine 22 is the power distribution and integration mechanism 30. Torque conversion operation mode for driving and controlling the motor MG1 and the motor MG2 so that the torque is converted by the motor MG1 and the motor MG2 and output to the ring gear shaft 32a, and the required power and the power required for charging and discharging the battery 50. The engine 22 is operated and controlled so that suitable power is output from the engine 22, and all or part of the power output from the engine 22 with charging / discharging of the battery 50 is the power distribution and integration mechanism 30, the motor MG1, and the motor. The required power is converted to the ring gear shaft 32 with torque conversion by MG2. Charge / discharge operation mode in which the motor MG1 and the motor MG2 are driven and controlled to be output to each other, and a motor operation mode in which the operation of the engine 22 is stopped and the power corresponding to the required power from the motor MG2 is output to the ring gear shaft 32a. and so on.

  Next, the operation of the hybrid vehicle 20 of the first embodiment configured as described above, in particular, braking while the accelerator pedal 83 is released or the brake pedal 85 is depressed while the engine 22 is running while driving. The operation at the time of the predetermined braking request that has been requested will be described. FIG. 3 is a flowchart showing an example of a predetermined braking request time control routine executed by the hybrid electronic control unit 70. This routine is repeatedly executed every predetermined time (for example, every several msec) when a predetermined braking is requested.

  When the predetermined braking request control routine is executed, the CPU 72 of the hybrid electronic control unit 70 firstly, the brake pedal position BP from the brake pedal position sensor 86, the vehicle speed V from the vehicle speed sensor 88, a predetermined time (for example, several The integrated air amount Ga as the integrated value of the intake air amount Qa (for example, ten seconds or several minutes), the catalyst temperature Tc, the rotational speed Ne of the engine 22, the rotational speed Nm of the motor MG2, the charge / discharge current Ib of the battery 50, the battery 50 There is a request to execute control of the engine 22 (hereinafter referred to as catalyst deterioration suppression control) for suppressing the deterioration of the purification catalyst 134a at the time of a predetermined braking request. Regardless, the non-execution rate Rr, which is the rate at which the catalyst deterioration suppression control was not executed, and the catalyst odor of the purification catalyst 134a Control of the engine 22 to win (hereinafter, referred to as catalyst odor suppression control) to execute the process of inputting data such as the catalyst odor suppression request flag Fs indicating whether the execution request has been made in (step S100). Here, as the integrated air amount Ga, what is calculated as an integrated value of the intake air amount Qa from the air flow meter 148 from a predetermined time before is input from the engine ECU 24 by communication. The catalyst temperature Tc is assumed to be input from the engine ECU 24 by communication from the temperature sensor 134b. The rotation speed Ne of the engine 22 is calculated based on a signal from the crank position sensor 140 and is input from the engine ECU 24 by communication. As the rotational speed Nm2 of the motor MG2, a value calculated based on the rotational position of the rotor of the motor MG2 detected by the rotational position detection sensor 44 is input from the motor ECU 40 by communication. The charge / discharge current Ib of the battery 50 is input from the battery ECU 52 through communication, as detected by the current sensor 51b. The storage ratio SOC of the battery 50 is calculated based on the integrated value of the charge / discharge current Ib from the current sensor 51b and is input from the battery ECU 52 by communication. The input limit Win of the battery 50 is calculated based on the battery temperature Tb of the battery 50 from the temperature sensor 51c and the storage rate SOC and is input from the battery ECU 52 by communication. The catalyst deterioration suppression control non-execution rate Rr is determined by an unexecuted rate setting routine (not shown) executed by the hybrid electronic control unit 70 when a predetermined braking request is made. Or the time during which the catalyst deterioration suppression control is not executed (the time when the catalyst odor suppression control or normal fuel cut control described later is executed in the first embodiment) of the time during which the temporary request is made. It was assumed that input was done by reading the data. The catalyst odor suppression request flag Fs is set to 0 as an initial value, and the execution of the catalyst odor suppression control is made when the catalyst odor generation condition where the generation of the catalyst odor of the purification catalyst 134a is assumed is satisfied. Is determined and set to a value of 1, and then a value of 0 is set when the catalyst odor generation condition is not satisfied by the execution of the catalyst odor suppression control or by the execution of the catalyst odor suppression control, What is set by a catalyst odor suppression request flag setting routine (not shown) executed by the engine ECU 24 is input from the engine ECU 24 by communication. Hereinafter, the details of the catalyst odor suppression request flag Fs will be described.

  First, in the first embodiment, the catalyst odor generation condition is a condition where there is a history of fuel increase correction, a condition where the purification catalyst 134a is exposed to a rich atmosphere, and a catalyst temperature Tc within a temperature range where the catalyst odor is likely to be generated. A condition that is equal to or higher than a threshold Tcsref (for example, 600 ° C. or 620 ° C.) defined as the lower limit is used. The catalyst odor of the purification catalyst 134a is a sulfur odor due to hydrogen sulfide, and the purification catalyst 134a is exposed to a rich atmosphere in a state where sulfur contained in the fuel is occluded and accumulated in the purification catalyst 134a. It is generated by desulfurization from 134a and reduction to hydrogen sulfide. It has been found that such a reaction is promoted when the catalyst temperature Tc is relatively high. On the other hand, when the purification catalyst 134a is exposed to a lean atmosphere, desulfurization is less likely to occur from the purification catalyst 134a, so that the generation of catalyst odor is suppressed. Therefore, in the first embodiment, based on these facts, there is a history of fuel increase correction, and when the purification catalyst 134a is exposed to a rich atmosphere and the catalyst temperature Tc is equal to or higher than the threshold value Tcsref, the catalyst odor generation condition is When the catalyst odor suppression request flag Fs is determined to be satisfied and the value 1 is set and there is no history of fuel increase correction, or when the purification catalyst 134a is not exposed to the rich atmosphere, the catalyst temperature Tc is the threshold value. When it is less than Tcsref, it is determined that the catalyst odor generation condition is not satisfied, and the value 0 is set to the catalyst odor suppression request flag Fs. The fuel increase correction is executed to cool the purification catalyst 134a or increase the output from the engine 22, and in the first embodiment, a predetermined time after the fuel increase correction is performed. It is assumed that the history of fuel increase correction is reset when elapses.

  When the data is thus input, the required braking torque to be output to the ring gear shaft 32a as the driving shaft connected to the driving wheels 39a, 39b as the braking torque required for the vehicle based on the input brake pedal position BP and the vehicle speed V. Tr * is set (step S110). In the first embodiment, the required braking torque Tr * is stored in the ROM 74 as a required braking torque setting map by predetermining the relationship among the brake pedal position BP, the vehicle speed V, and the required braking torque Tr *. When BP and vehicle speed V are given, the corresponding required braking torque Tr * is derived from the stored map and set. FIG. 4 shows an example of the required braking torque setting map. In the first embodiment, negative torque is used as braking torque. Therefore, when the braking torque is output from the motor MG2, it is used as a negative value in the mathematical expression.

  Subsequently, it is determined whether or not the battery 50 is fully charged (for example, 85%, 90%, 95%, etc.) (step S120), and when it is determined that the battery 50 is not fully charged, the catalyst temperature Tc is set. Comparison is made with a predetermined threshold value Tcdref1 (step S130). Here, the threshold value Tcdref1 is used to determine whether or not the deterioration of the purification catalyst 134a is likely to be promoted, and is a temperature range in which the deterioration of the purification catalyst 134a is expected to be promoted (specifically, Is defined as a lower limit of a temperature range in which deterioration of the purification catalyst 134a is assumed to be accelerated when the purification catalyst 134a is exposed to a lean atmosphere. For example, 800 ° C. or 820 ° C. can be used.

  When the catalyst temperature Tc is equal to or higher than the threshold value Tcdref1, it is determined that the present request for executing the catalyst deterioration suppression control, which is the control of the engine 22 for suppressing the promotion of deterioration of the purification catalyst 134a, is made (step S140). An execution command for deterioration suppression control is transmitted to engine ECU 24 (step S150). The engine ECU 24 that has received the execution command for the catalyst deterioration suppression control causes the engine 22 to operate independently at a predetermined rotation speed Ne1 (for example, an idle rotation speed or a slightly higher rotation speed) as the catalyst deterioration suppression control. 22 (specifically, the intake air amount control for controlling the opening of the throttle valve 124, the fuel injection control for controlling the fuel injection amount from the fuel injection valve 126, and the ignition for controlling the ignition timing of the spark plug 130) Control, intake valve timing variable control for controlling the opening / closing timing of the intake valve 128, etc.). As a result, the exhaust gas after the explosive combustion of the air-fuel mixture flows through the purification catalyst 134a, so that the purification catalyst 134a having the catalyst temperature Tc of the threshold value Tcdref1 or more can be prevented from being exposed to the lean atmosphere. It is possible to suppress the deterioration of the catalyst 134a.

  Subsequently, a torque command Tm1 * as a torque to be output from the motor MG1 is set by the following equation (1) so that the rotational speed Ne of the engine 22 becomes a predetermined rotational speed Ne1 (step S160), and the required braking torque Tr * is set. A provisional torque which is a provisional value of the torque to be output from the motor MG2 by adding a value obtained by dividing the set torque command Tm1 * by the gear ratio ρ of the power distribution and integration mechanism 30 and further dividing by the gear ratio Gr of the reduction gear 35 Tm2tmp is calculated by the following equation (2) (step S260), and the power consumption (power generation) of the motor MG1 obtained by multiplying the input limit Win of the battery 50 and the set torque command Tm1 * by the current rotational speed Nm1 of the motor MG1. The torque as the lower limit of the torque that may be output from the motor MG2 by dividing the difference from the electric power) by the rotational speed Nm2 of the motor MG2 The limit Tm2min is calculated by the following equation (3) (step S262), the set temporary torque Tm2tmp is limited by the torque limit Tm2min by the equation (4), and the torque command Tm2 * of the motor MG2 is set (step S264). Required for the hydraulic brake when the value obtained by multiplying the torque command Tm2 * of the motor MG2 multiplied by the gear ratio Gr of the reduction gear 35 from the required braking torque Tr * is converted into the ring gear shaft 32a as the drive shaft. The brake torque command Tb * is set (step S270). Here, Expression (1) is a relational expression in feedback control for rotating the engine 22 at a predetermined rotational speed Ne1, and in Expression (1), “k1” in the first term on the right side is a gain of a proportional term. “K2” in the second term on the right side is the gain of the integral term. In the first embodiment, as the catalyst deterioration suppression control, the engine 22 is controlled so that the engine 22 operates independently at the predetermined rotation speed Ne1, and therefore when the rotation speed Ne of the engine 22 is equal to the predetermined rotation speed Ne1. When the torque command Tm1 * of the motor MG1 is set to a value of 0 and the rotational speed Ne of the engine 22 deviates from the predetermined rotational speed Ne1 (for example, the engine 22 is operated at a rotational speed higher than the predetermined rotational speed Ne1). The motor MG1 torque command Tm1 * is applied until the engine speed Ne reaches the predetermined engine speed Ne1 or when the engine speed Ne changes after that. A value other than 0 is set. Further, FIG. 5 shows the power when no torque is output from the motor MG1 and no braking force is output from the hydraulic brake and the regenerative torque is output from the motor MG2 (the motor MG2 is regeneratively driven). FIG. 6 is an explanatory diagram showing an example of a collinear diagram showing a dynamic relationship between the number of rotations and torque in a rotating element of the distribution and integration mechanism 30. In the figure, the left S-axis indicates the rotation speed of the sun gear 31 that is the rotation speed Nm1 of the motor MG1, the C-axis indicates the rotation speed of the carrier 34 that is the rotation speed Ne of the engine 22, and the R-axis indicates the rotation speed of the motor MG2. The rotational speed Nr of the ring gear 32 obtained by dividing the number Nm2 by the gear ratio Gr of the reduction gear 35 is shown. Equation (2) can be easily derived by using this alignment chart.

Tm1 * = k1 ・ (Ne * -Ne) + k2 ・ ∫ (Ne * -Ne) dt (1)
Tm2tmp = (Tr * + Tm1 * / ρ) / Gr (2)
Tm2min = (Win-Tm1 * ・ Nm1) / Nm2 (3)
Tm2 * = max (Tm2tmp, Tm2min) (4)

  When the torque commands Tm1 *, Tm2 * and the brake torque command Tb * of the motors MG1, MG2 are set in this way, the torque commands Tm1 *, Tm2 * of the motors MG1, MG2 are set to the motor ECU 40, and the brake ECU 94 is set to the brake torque command Tb *. (Step S280), and this routine is terminated. Receiving the torque commands Tm1 * and Tm2 *, the motor ECU 40 controls the switching elements of the inverters 41 and 42 so that the motor MG1 is driven by the torque command Tm1 * and the motor MG2 is driven by the torque command Tm2 *. . Further, the brake ECU 94 that has received the brake torque command Tb * drives and controls the brake actuator 92 so that the braking force by the brake wheel cylinders 96a to 96d becomes a torque corresponding to the brake torque Tb * when converted to the ring gear shaft 32a. . Thereby, the braking torque which becomes the required braking torque Tr * when converted to the ring gear shaft 32a by the torque output from the motor MG2 and the braking force by the brake wheel cylinders 96a to 96d can be applied to the vehicle.

  When the catalyst temperature Tc is lower than the threshold Tcdref1 in step S130, the catalyst temperature Tc is compared with a threshold Tcdref2 (for example, 750 ° C. or 770 ° C.) determined as a temperature lower than the threshold Tcdref1 (step S170). When it is equal to or greater than the threshold value Tcdref2, it is determined that a temporary request for execution of the catalyst deterioration suppression control has been made (step S180).

  Then, the non-execution rate Rr of the catalyst deterioration suppression control is compared with the threshold value Rref (step S190), the storage ratio SOC of the battery 50 is compared with the threshold value Sref, and the charge / discharge current Ib of the battery 50 is compared with the value 0 (step). S200), the vehicle speed V is compared with the threshold value Vref, and the integrated air amount Ga is compared with the threshold value Gref (step S210). Here, the threshold value Rref is used to determine whether or not the execution request (the actual request or temporary request for execution) of the catalyst deterioration suppression control is sufficiently satisfied. For example, the threshold value Rref is 5% or 10%. Etc. can be used. The threshold value Sref is used to determine whether or not the battery 50 is in a state that is relatively close to full charge. The threshold value Sref is determined as a power storage rate SOC that is slightly smaller than full charge. Thus, a storage rate SOC of a predetermined rate (for example, 80% or 90%) or a storage rate SOC that is smaller than a full charge by a predetermined value (for example, 10% or 15%) can be used. The process of step S200 is a process of determining whether or not the battery 50 is charged in a state relatively close to full charge, that is, whether or not the battery 50 is assumed to be fully charged. Further, the threshold value Vref and the threshold value Gref are used to determine whether or not the current traveling state is a temperature rising traveling state determined as a traveling state in which the catalyst temperature Tc is likely to rise above the threshold value Tcdref1. As the threshold value Vref, for example, 130 km / h or 150 km / h can be used, and as the threshold value Gref, for example, 8000 g or 10,000 g can be used.

  When the non-execution rate Rr of the catalyst deterioration suppression control is greater than or equal to the threshold value Rref in step S190, it is determined that the request for executing the catalyst deterioration suppression control is not sufficiently satisfied, and in step S200, the storage ratio SOC of the battery 50 is equal to or greater than the threshold value Sref. When the charge / discharge current Ib of the battery 50 is less than 0 (the battery 50 is charged), it is determined that the battery 50 is fully charged, and the vehicle speed V is set to the threshold value Vref in step S210. When the accumulated air amount Ga is equal to or greater than the threshold value Gref, it is determined that the current travel state is a temperature rise travel state. In these cases, an execution command for catalyst deterioration suppression control is transmitted to the engine ECU 24. (Step S150), torque commands Tm1 * and Tm2 * for motors MG1 and MG2 are set and brakes are set. By sending them to the motor ECU40 and the brake ECU94 sets the torque command Tb * (step S160, S260~S280), the routine ends. That is, for the engine 22, in addition to when the catalyst temperature Tc is equal to or higher than the threshold Tcdref1 (when the request for execution of catalyst deterioration suppression control is made), when the catalyst temperature Tc is lower than the threshold Tcdref1 and equal to or higher than the threshold Tcdref2 ( The battery 50 is charged when the non-execution rate Rr of the catalyst deterioration suppression control is equal to or greater than the threshold value Rref, or when the storage ratio SOC of the battery 50 is equal to or greater than the threshold value Sref. When the vehicle speed V is equal to or higher than the threshold value Vref and the integrated air amount Ga is equal to or higher than the threshold value Gref, the catalyst deterioration suppression control is executed. Thereby, the opportunity to perform catalyst deterioration suppression control can be increased more, and it can suppress more that deterioration of the purification catalyst 134a is accelerated | stimulated.

  On the other hand, in steps S190 to S210, the non-execution rate Rr of the catalyst deterioration suppression control is less than the threshold value Rref, and the storage ratio SOC of the battery 50 is less than the threshold value Sref, or the charge / discharge current Ib of the battery 50 is greater than or equal to the value 0. (The battery 50 is not charged), and when the vehicle speed V is less than the threshold value Vref or the integrated air amount Ga is less than the threshold value Gref, the request for executing the catalyst deterioration suppression control is sufficiently satisfied. 50 is not expected to be fully charged, and it is determined that the current running state is not a temperature rising running state, and the value of the catalyst odor suppression request flag Fs is examined (step S220).

  When the catalyst odor suppression request flag Fs is 0, it is determined that the execution request of the catalyst odor suppression control that is the control of the engine 22 for suppressing the catalyst odor of the purification catalyst 134a is not made, and the normal fuel cut is performed. A control execution command is transmitted to the engine ECU 24 (step S240), a value 0 is set in the torque command Tm1 * of the motor MG1 (step S250), and a torque command Tm2 * of the motor MG2 is set (steps S260 to S264). The brake torque command Tb * is set (step S270), the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are transmitted to the motor ECU 40, and the brake torque command Tb * is transmitted to the brake ECU 94 (step S280). End the routine. The engine ECU 24 that receives the normal fuel cut control execution command stops the fuel injection control in the engine 22. In this case, the engine 22 that has stopped fuel injection may be motored by the motor MG1 to apply braking torque to the ring gear shaft 32a. Hereinafter, this braking torque is referred to as engine braking. When the engine brake is applied to the ring gear shaft 32a, the difference between the required braking torque Tr * and the engine brake is obtained by using the torque output from the motor MG2 and the braking force by the brake wheel cylinders 96a to 96d as the ring gear. What is necessary is just to cover with the torque converted into the shaft 32a (hereinafter referred to as hydraulic braking force conversion torque).

  On the other hand, when the catalyst odor suppression request flag Fs is a value of 1 in step S220, it is determined that a request for executing the catalyst odor suppression control is made, and an execution command for the catalyst odor suppression control is transmitted to the engine ECU 24 (step S230). The torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are set and the brake torque command Tb * is set and transmitted to the motor ECU 40 and the brake ECU 94 (steps S250 to S280), and this routine is finished. The engine ECU 24 that has received the execution command for the catalyst odor suppression control stops the fuel injection control in the engine 22 and controls the intake air amount Qa so that the intake air amount Qa becomes larger than when performing the normal fuel cut control. By such control, air flows in the purification catalyst 134a instead of the exhaust gas after combustion of the air-fuel mixture, so that the purification catalyst 134a can be prevented from being exposed to a rich atmosphere, and the catalyst odor of the purification catalyst 134a can be suppressed. can do. In addition, in this case, the purification catalyst 134a is exposed to the lean atmosphere more quickly by controlling the engine 22 so that the intake air amount Qa becomes larger than when performing the normal fuel cut control (to the rich atmosphere). Can be eliminated).

  When the catalyst temperature Tc is less than the threshold value Tcdref2 in step S170, it is determined that neither the main request nor the temporary request for execution of the catalyst deterioration suppression control is made, and the value of the catalyst odor suppression request flag Fs is checked (step S220). When the suppression request flag Fs is 0, a normal fuel cut control execution command is transmitted to the engine ECU 24 (step S240). When the catalyst odor suppression request flag Fs is 1, the catalyst odor suppression control execution command is sent to the engine. It transmits to ECU24 (step S230). Then, the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are set and the brake torque command Tb * is set and transmitted to the motor ECU 40 and the brake ECU 94 (steps S250 to S280), and this routine is finished. . Thereby, the catalyst odor of the purification catalyst 134a can be suppressed when the catalyst odor generation condition is satisfied.

  When it is determined in step S120 that the battery 50 is fully charged, the value of the catalyst odor suppression request flag Fs is checked (step S220). When the catalyst odor suppression request flag Fs is 0, normal fuel cut control is executed. A command is transmitted to the engine ECU 24 (step S240), and when the catalyst odor suppression request flag Fs is 1, the execution command of the catalyst odor suppression control is transmitted to the engine ECU 24 (step S230). Then, the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are set and the brake torque command Tb * is set and transmitted to the motor ECU 40 and the brake ECU 94 (steps S250 to S280), and this routine is finished. . That is, when the battery 50 is fully charged, the catalyst deterioration suppression control is not executed regardless of the catalyst temperature Tc. When performing the catalyst deterioration suppression control, as described above, torque for adjusting the rotational speed Ne of the engine 22 may be output from the motor MG1, and the torque decreases the rotational speed Ne of the engine 22. When the torque is less than that, power is generated by the motor MG1. When the battery 50 is fully charged, it is preferable not to generate power by the motor MG1, so in the first embodiment, the catalyst deterioration suppression control is not executed. Thereby, protection of the battery 50 can be aimed at. In this case, since it is preferable not to perform the regenerative drive also for the motor MG2, the required braking torque Tr * is covered by the hydraulic braking force conversion torque or by the engine brake and the hydraulic braking force conversion torque. You can make it appear.

  According to the hybrid vehicle 20 of the first embodiment described above, the catalyst temperature Tc is the threshold value Tcdref1 for the engine 22 when the braking request is made while the engine 22 is running. In addition to the above, when the catalyst temperature Tc is less than the threshold value Tcdref1 and greater than or equal to the threshold value Tcdref2, when the non-execution rate Rr of the catalyst deterioration suppression control is greater than or equal to the threshold value Rref, or the storage ratio SOC of the battery 50 is greater than or equal to the threshold value Sref. When the battery 50 is charged, the catalyst deterioration suppression control is executed to control the fuel injection so that the vehicle is operated even when the vehicle speed V is equal to or higher than the threshold value Vref and the integrated air amount Ga is equal to or higher than the threshold value Gref. From this, it is possible to increase the opportunities for executing the catalyst deterioration suppression control, and the deterioration of the purification catalyst 134a. It can be further suppressed from being promoted.

  In the hybrid vehicle 20 of the first embodiment, when the catalyst temperature Tc is lower than the threshold value Tcdref1 and equal to or higher than the threshold value Tcdref2, the non-execution rate Rr of the catalyst deterioration suppression control, the storage ratio SOC and charge / discharge current Ib of the battery 50, the vehicle speed V, and Although it is determined whether to execute the catalyst deterioration suppression control or other control (catalyst odor suppression control or normal fuel cut control) using the integrated air amount Ga, without using some of these. It may be determined whether to execute the catalyst deterioration suppression control or another control. For example, whether or not the catalyst deterioration suppression control is executed using only the non-execution rate Rr of the catalyst deterioration suppression control without considering the storage ratio SOC, the charge / discharge current Ib, the vehicle speed V, and the integrated air amount Ga of the battery 50. Whether to execute the control may be determined, or only the storage ratio SOC and charge / discharge current Ib of the battery 50 may be determined without considering the non-execution rate Rr, the vehicle speed V, and the integrated air amount Ga of the catalyst deterioration suppression control. It is good also as what determines whether catalyst deterioration suppression control is performed, or performs other control, and considers the non-execution rate Rr of the catalyst deterioration suppression control, the storage ratio SOC of the battery 50, and the charge / discharge current Ib. Instead, it may be determined whether to execute the catalyst deterioration suppression control or other control using only the vehicle speed V and the integrated air amount Ga. Further, in determining whether to execute the catalyst deterioration suppression control or to perform other control, the catalyst is included in the time during which the execution request for the catalyst deterioration suppression control (this request or temporary request for execution) is made at the time of the predetermined braking request. Regarding the process of step S190 using the non-execution rate Rr as a proportion of the time when the deterioration suppression control has not been executed, an execution request for the catalyst deterioration suppression control is made at the time of a predetermined braking request instead of or in addition to the non-execution rate Rr. The catalyst deterioration suppression control is executed despite the non-execution time as the time when the catalyst deterioration suppression control has not been executed in spite of being made or the execution request of the catalyst deterioration suppression control is made at the time of a predetermined braking request. The number of unexecuted times may be used as the number of times it has not been performed. Further, in the determination of whether to execute the catalyst deterioration suppression control or other control, the charge / discharge current Ib of the battery 50 is used for the process of step S200 using the storage ratio SOC of the battery 50 and the charge / discharge current Ib. Instead, only the power storage rate SOC of the battery 50 may be used. Alternatively, in the determination of whether to execute the catalyst deterioration suppression control or another control, only the vehicle speed V is used without using the integrated air amount Ga for the process of step S210 using the vehicle speed V and the integrated air amount Ga. It may be a thing.

  Next, a hybrid vehicle 20B as a second embodiment of the present invention will be described. The hybrid vehicle 20B of the second embodiment has the same hardware configuration as the hybrid vehicle 20 of the first embodiment described with reference to FIG. Therefore, in order to avoid redundant description, detailed description of the hardware configuration of the hybrid vehicle 20B of the second embodiment is omitted.

  In the hybrid vehicle 20B of the second embodiment, the hybrid electronic control unit 70 executes a predetermined braking request control routine illustrated in FIG. 6 instead of the predetermined braking request control routine of FIG. When the predetermined braking request control routine of FIG. 6 is executed, the CPU 72 of the hybrid electronic control unit 70 firstly starts the brake pedal position BP, the vehicle speed V, the engine speed Ne, the motor MG2 speed Nm2, and the battery. 50, an input restriction Win, a catalyst odor suppression request flag Fs, a catalyst deterioration suppression main request flag Fd1 indicating whether or not the main request for execution of the catalyst deterioration suppression control has been made, and a provisional request for execution of the catalyst deterioration suppression control. A process for inputting data such as priority between the catalyst deterioration suppression temporary request flag Fd2 indicating whether or not the catalyst deterioration suppression control and other control (catalyst odor suppression control or normal fuel cut control in the second embodiment). Is executed (step S300). Here, the brake pedal position BP, the vehicle speed V, the rotational speed Ne of the engine 22, the rotational speed Nm of the motor MG2, the input limit Win of the battery 50, and the catalyst odor suppression request flag Fs are as shown in FIG. The input is made in the same manner as in step S100. Further, the catalyst deterioration suppression main request flag Fd1 is set to a value of 0 when the catalyst temperature Tc is less than the threshold value Tcdref1, it is determined that the main request for executing the catalyst deterioration suppression control is not made, and the catalyst temperature Tc is set to the threshold It is determined that the present request for execution of the catalyst deterioration suppression control is made when Tcdref1 is equal to or higher than Tcdref1, and the value 1 is set. The catalyst deterioration suppression temporary request flag Fd2 indicates whether the catalyst temperature Tc is less than the threshold value Tcdref2 or a threshold value When it is determined that a temporary request for execution of catalyst deterioration suppression control is not made when Tcdref1 or higher, a value of 0 is set, and when catalyst temperature Tc is equal to or higher than threshold value Tcdref2 and lower than threshold value Tcdref1, execution of catalyst deterioration suppression control is executed. This flag is set to a value of 1 when it is determined that a temporary request has been made, and both are executed by the engine ECU 24. Those set by the unillustrated catalyst degradation control request flag setting routine was assumed to be input through communication from the engine ECU24 that. Furthermore, the priority order between the catalyst deterioration suppression control and the other control is input by reading the priority order set routine of FIG. 7 executed by the hybrid electronic control unit 70. Hereinafter, the description of the predetermined braking request time control routine of FIG. 6 will be temporarily interrupted, and the priority order setting routine of FIG. 7 will be described.

  When the priority order setting routine of FIG. 7 is executed, the CPU 72 of the hybrid electronic control unit 70 first starts with the vehicle speed V, the integrated air amount Ga, the charge / discharge current Ib of the battery 50, the storage ratio SOC of the battery 50, the catalyst deterioration. Processing for inputting data such as the non-execution rate Rr of the suppression control and the catalyst deterioration suppression temporary request flag Fd2 is executed (step S500). Here, with respect to the vehicle speed V, the integrated air amount Ga, the charge / discharge current Ib of the battery 50, the storage ratio SOC of the battery 50, and the non-execution rate Rr of the catalyst deterioration suppression control, step S100 of the predetermined braking request control routine of FIG. It was assumed that the input was the same as in the above process. Further, the catalyst deterioration suppression temporary request flag Fd2 is input in the same manner as the processing in step S100 of the predetermined braking request control routine of FIG.

  When the data is input in this way, the value of the input catalyst deterioration suppression temporary request flag Fd2 is checked (step S510). When the catalyst deterioration suppression temporary request flag Fd2 is 0, it is determined that a temporary request for catalyst deterioration suppression control is not made. Then, this routine is finished as it is.

  On the other hand, when the catalyst deterioration suppression temporary request flag Fd2 is 1, it is determined that a temporary request for catalyst deterioration suppression control has been made, and the non-execution rate Rr of the catalyst deterioration suppression control is compared with a threshold value Rref (step S520). The storage ratio SOC of the battery 50 is compared with the threshold value Sref, the charge / discharge current Ib of the battery 50 is compared with the value 0 (step S530), the vehicle speed V is compared with the threshold value Vref, and the integrated air amount Ga is compared with the threshold value Gref. (Step S540).

  When the non-execution rate Rr of the catalyst deterioration suppression control is equal to or greater than the threshold value Rref, or when the storage ratio SOC of the battery 50 is equal to or greater than the threshold value Sref, the charge / discharge current Ib of the battery 50 is less than 0 (the battery 50 is charged). When the vehicle speed V is equal to or higher than the threshold value Vref and the integrated air amount Ga is equal to or higher than the threshold value Gref, the priority order for the control of the engine 22 is set to catalyst deterioration suppression control, other control (catalyst odor suppression control or normal control). (Fuel cut control) in this order (step S550), this routine is terminated, whether the catalyst deterioration suppression control non-execution rate Rr is less than the threshold value Rref, and whether the storage ratio SOC of the battery 50 is less than the threshold value Sref. 50 charge / discharge current Ib is 0 or more (the battery 50 is not charged), and the vehicle speed V is not the threshold Vref. When less than a or cumulative air amount Ga threshold Gref is, the priority for control of the engine 22, other control, as the order of the catalyst degradation control (step S560), and terminates this routine.

  The priority order setting routine of FIG. 7 has been described above. Returning to the description of the predetermined braking request time control routine of FIG. When data is input in step S300, the required braking torque Tr * is set based on the input brake pedal position BP and the vehicle speed V using the above-described required braking torque setting map of FIG. 4 (step S310), and the battery 50 Is determined to be fully charged (step S320). When it is determined that the battery 50 is not fully charged, the value of the catalyst deterioration suppression main request flag Fd1 is checked (step S330), and the catalyst deterioration suppression main request flag is determined. When Fd1 is 1, it is determined that this request for execution of catalyst deterioration suppression control has been made, and an execution command for catalyst deterioration suppression control is transmitted to the engine ECU 24 (step S350). The torque command Tm1 * of the motors MG1 and MG2 is the same as the processing in steps S160 and S260 to S280 of the routine. Sets the Tm2 * set the brake torque command Tb * to send them to the motor ECU40 and the brake ECU 94 (step S360, S460~S480), the routine ends. Thereby, it is possible to suppress the deterioration of the purification catalyst 134a.

  When the catalyst deterioration suppression main request flag Fd1 is 0 in step S330, it is determined that the main request for executing the catalyst deterioration suppression control is not made, and the value of the catalyst deterioration suppression temporary request flag Fd2 is checked (step S370). When the deterioration suppression temporary request flag Fd2 is 1, it is determined that a temporary request for execution of the catalyst deterioration suppression control has been made, and the catalyst deterioration suppression control and other controls (catalyst odor suppression control or normal fuel cut control) Is checked (step S390).

  When the priority is the order of catalyst deterioration suppression control and other control, an execution command for catalyst deterioration suppression control is transmitted to engine ECU 24 (step S350), and torque commands Tm1 * and Tm2 * for motors MG1 and MG2 are set. At the same time, the brake torque command Tb * is set and transmitted to the motor ECU 40 and the brake ECU 94 (steps S360, S460 to S480), and this routine is terminated. On the other hand, when the priority is in the order of other control and catalyst deterioration suppression control, the value of the catalyst odor suppression request flag Fs is checked (step S420). When the catalyst odor suppression request flag Fs is 0, the catalyst odor suppression control is performed. It is determined that an execution request has not been made, and a normal fuel cut control execution command is transmitted to the engine ECU 24 (step S440). When the catalyst odor suppression request flag Fs is a value 1, an execution request for catalyst odor suppression control is made. Then, an execution command for the catalyst odor suppression control is transmitted to the engine ECU 24 (step S430), the torque commands Tm1 * and Tm2 * for the motors MG1 and MG2 are set and the brake torque command Tb * is set and these are set. Is transmitted to the motor ECU 40 and the brake ECU 94 (steps S450 to S480), and this routine is terminated. That is, when the temporary request for executing the catalyst deterioration suppression control and the execution request for the catalyst odor suppression control are both made (when the catalyst deterioration suppression temporary request flag Fd2 and the catalyst odor suppression request flag Fs are both 1). The catalyst deterioration suppression control or the catalyst odor suppression control is executed according to the priority order of the catalyst deterioration suppression control and the other control, and a temporary request for the execution of the catalyst deterioration suppression control is made, but the catalyst odor suppression control is executed. When the request is not made (when the catalyst deterioration suppression temporary request flag Fd2 has a value of 1 and the catalyst odor suppression request flag Fs has a value of 0), according to the priority order of the catalyst deterioration suppression control and other controls. Catalyst deterioration suppression control or normal fuel cut control is executed. Therefore, when both the provisional request to execute the catalyst deterioration suppression control and the request to execute the catalyst odor suppression control are made, the catalyst odor suppression control is executed more than the one that executes the catalyst deterioration suppression control regardless of other requirements. It is possible to increase the number of opportunities to perform the catalyst deterioration suppression control as compared with the case of performing the catalyst odor suppression control regardless of other requirements. As a result, it is possible to more appropriately achieve both suppression of the deterioration of the purification catalyst 134a and suppression of the catalyst odor of the purification catalyst 134a.

  When it is determined in step S320 that the battery 50 is fully charged, or when the catalyst deterioration suppression temporary request flag Fd2 is 0 in step S370, the value of the catalyst odor suppression request flag Fs is checked (step S420). When the suppression request flag Fs has a value of 0, a normal fuel cut control execution command is transmitted to the engine ECU 24 (step S440). (Step S430). Then, the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are set and the brake torque command Tb * is set and transmitted to the motor ECU 40 and the brake ECU 94 (steps S450 to S480), and this routine is finished. . Thus, the catalyst odor of the purification catalyst 134a can be suppressed when the catalyst odor generation condition is satisfied, and the battery 50 can be protected when the battery 50 is fully charged.

  According to the hybrid vehicle 20B of the second embodiment described above, this request for the catalyst deterioration suppression control is made at the time of a predetermined braking request in which a braking request is made while the engine 22 is running. Occasionally, the engine 22 is subjected to catalyst deterioration suppression control, and even when the main request for execution of catalyst deterioration suppression control is not made, a temporary request for catalyst deterioration suppression control is made and a request for execution of catalyst odor suppression control is made. The catalyst deterioration suppression control and other controls (in this case, catalyst odor) using the non-execution rate Rr of the catalyst deterioration suppression control, the storage ratio SOC and charge / discharge current Ib of the battery 50, the vehicle speed V, and the integrated air amount Ga. Priority control), and when the priority is in the order of catalyst deterioration suppression control and other control, the catalyst 22 is subjected to catalyst deterioration suppression control. Since run in preference to other control, it is possible to more opportunities to perform the catalyst degradation control, the deterioration of the purifying catalyst 134a can be further suppressed from being promoted.

  In the hybrid vehicle 20B of the second embodiment, the catalyst deterioration suppression control and other controls are performed using the non-execution rate Rr of the catalyst deterioration suppression control, the storage ratio SOC and charge / discharge current Ib of the battery 50, the vehicle speed V, and the integrated air amount Ga. The priority order is set with the catalyst odor suppression control when the catalyst odor suppression request flag Fs is 1, and the normal fuel cut control when the catalyst odor suppression request flag Fs is 0. It is good also as what sets the priority of catalyst deterioration suppression control and other control, without using. For example, the catalyst deterioration suppression control and other controls are performed using only the non-execution rate Rr of the catalyst deterioration suppression control without considering the storage ratio SOC, charge / discharge current Ib, vehicle speed V, and integrated air amount Ga of the battery 50. The priority may be set, or the catalyst deterioration suppression control non-execution rate Rr, the vehicle speed V, and the integrated air amount Ga are not taken into consideration, and only the storage ratio SOC of the battery 50 and the charge / discharge current Ib are used for the catalyst. The priority order between the deterioration suppression control and the other control may be set, and the vehicle speed V and the non-execution rate Rr of the catalyst deterioration suppression control, the storage ratio SOC of the battery 50, and the charge / discharge current Ib are not considered. The priority order of the catalyst deterioration suppression control and other controls may be set using only the integrated air amount Ga. In the setting of the priority order between the catalyst deterioration suppression control and the other control, the processing in step S520 using the non-execution rate Rr is replaced with the non-execution rate Rr, or the above-mentioned non-execution time, the number of executions, etc. It may be used. Furthermore, in the setting of the priority order between the catalyst deterioration suppression control and the other control, the processing in step S530 using the storage ratio SOC and the charge / discharge current Ib of the battery 50 is performed without using the charge / discharge current Ib of the battery 50. Only a storage ratio SOC of 50 may be used. Alternatively, only the vehicle speed V may be used without using the integrated air amount Ga for the processing of step S540 using the vehicle speed V and the integrated air amount Ga in setting the priority order between the catalyst deterioration suppression control and the other control. Good.

  In the hybrid vehicles 20 and 20B of the first and second embodiments, the engine 22 is controlled so that the engine 22 is operated independently at a predetermined rotational speed Ne1 as the catalyst deterioration suppression control. However, fuel injection is performed. For example, the engine 22 may be controlled so that a slight torque is output. In this case, the motor MG1 may be controlled so that power generation is performed using torque from the engine 22 in order to prevent the engine 22 from blowing up.

  In the hybrid vehicles 20 and 20B of the first embodiment and the second embodiment, when the battery 50 is fully charged, the catalyst odor suppression control or the normal fuel cut control is not performed for the engine 22 without executing the catalyst deterioration suppression control. It is assumed that the motor MG1 is controlled so that no torque is output. However, even when the battery 50 is fully charged, the motor MG1 is controlled so that no power generation torque is output (so that the battery 50 is not charged). May execute catalyst deterioration suppression control as necessary.

  In the hybrid vehicles 20 and 20B of the first and second embodiments, when performing the catalyst odor suppression control for the engine 22, the fuel injection control in the engine 22 is stopped and the intake is performed more than when the normal fuel cut control is performed. Although the intake air amount control is performed so that the air amount Qa is increased, the same control as that performed when performing the normal fuel cut control may be performed.

  In the hybrid vehicles 20 and 20B of the first and second embodiments, the power of the motor MG2 is shifted by the reduction gear 35 and output to the ring gear shaft 32a. However, the hybrid vehicle 120 of the modified example of FIG. As illustrated, the power of the motor MG2 is output to an axle (an axle connected to the wheels 64a and 64b in FIG. 8) different from the axle to which the ring gear shaft 32a is connected (the axle to which the drive wheels 63a and 63b are connected). It is good also as what to do.

  In the hybrid vehicles 20 and 20B of the first and second embodiments, the power from the engine 22 is output to the ring gear shaft 32a as the drive shaft connected to the drive wheels 63a and 63b via the power distribution and integration mechanism 30. At the same time, the power from the motor MG2 is output to the ring gear shaft 32a via the reduction gear 35. However, as illustrated in the hybrid vehicle 220 of the modified example of FIG. 9, the drive shaft connected to the drive wheels 63a and 63b. The motor MG is attached to the motor MG via the transmission 230, and the engine 22 is connected to the rotation shaft of the motor MG via the clutch 229. The power from the engine 22 is transmitted via the rotation shaft of the motor MG and the transmission 230. The power output from the motor MG may be output to the drive shaft via the transmission 230 while being output to the drive shaft. Further, as illustrated in the hybrid vehicle 320 of the modification of FIG. 10, the power from the engine 22 is output to the axle connected to the drive wheels 63a and 63b via the transmission 330 and the power from the motor MG is driven. It may be output to an axle different from the axle to which the wheels 63a and 63b are connected (the axle connected to the wheels 64a and 64b in FIG. 10). In other words, any type of hybrid vehicle may be used as long as it has an internal combustion engine that outputs driving power and an electric motor that inputs and outputs driving power.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. As a relationship between the first and second embodiments and the corresponding first to sixth hybrid vehicles of the present invention, an engine in which a purification device 134 having a purification catalyst 134a is attached to an exhaust system in common. 22 corresponds to an “internal combustion engine”, the motor MG2 corresponds to an “electric motor”, and the battery 50 corresponds to a “secondary battery”.

  In the relationship between the first embodiment and the first hybrid vehicle of the present invention, when a predetermined braking request is made, when the catalyst temperature Tc is equal to or higher than the threshold Tcdref1 and when the catalyst temperature Tc is lower than the threshold Tcdref1 and equal to or higher than the threshold Tcdref2, the battery 50 When the battery 50 is charged when the storage ratio SOC of the battery is equal to or greater than the threshold value Sref, an execution command of catalyst deterioration suppression control for controlling the fuel injection to be performed is transmitted to the engine ECU 24, and the required braking torque Tr * When the hybrid electronic control unit 70 that executes the predetermined braking request time control routine of FIG. 3 that sets the torque command Tm2 * of the motor MG2 and transmits the torque command Tm2 * to the motor ECU 40 is received, and the execution command of the catalyst deterioration suppression control is received As a catalyst deterioration suppression control, the engine 22 is operated independently at a predetermined rotational speed Ne1. An engine ECU24 for controlling so that the engine 22, the motor ECU40 controls the motor MG2 based on the torque command Tm2 * of the motor MG2 received, but corresponds to the "predetermined braking demand control unit". In the relationship between the first embodiment and the third hybrid vehicle of the present invention, when the predetermined braking request is made, when the catalyst temperature Tc is equal to or higher than the threshold value Tcdref1 and when the catalyst temperature Tc is lower than the threshold value Tcdref1 and equal to or higher than the threshold value Tcdref2, the vehicle speed V Is equal to or greater than the threshold value Vref and the integrated air amount Ga is equal to or greater than the threshold value Gref, an execution command for catalyst deterioration suppression control is transmitted to the engine ECU 24, and a torque command Tm2 * for the motor MG2 is set based on the required braking torque Tr *. Then, the hybrid electronic control unit 70 that executes the predetermined braking request time control routine of FIG. 3 to be transmitted to the motor ECU 40, the engine ECU 24 that executes the catalyst deterioration suppression control when the execution command of the catalyst deterioration suppression control is received, Based on the received torque command Tm2 * of the motor MG2, the motor MG2 is And Gosuru motor ECU 40, but corresponds to the "predetermined braking demand control unit". In the relationship between the first embodiment and the fifth hybrid vehicle of the present invention, the catalyst deterioration occurs when the catalyst temperature Tc is equal to or higher than the threshold value Tcdref1 and when the catalyst temperature Tc is lower than the threshold value Tcdref1 and equal to or higher than the threshold value Tcdref2. When the non-execution rate Rr of the suppression control is equal to or greater than the threshold value Rref, an execution command for the catalyst deterioration suppression control is transmitted to the engine ECU 24, and the motor ECU 40 sets the torque command Tm2 * of the motor MG2 based on the required braking torque Tr *. The hybrid electronic control unit 70 for executing the predetermined braking request control routine of FIG. 3 transmitted to the engine, the engine ECU 24 for executing the catalyst deterioration suppression control when receiving the execution command of the catalyst deterioration suppression control, and the received motor MG2 ECU for controlling motor MG2 based on torque command Tm2 * 0, but it corresponds to the "predetermined braking demand control unit".

  In the relationship between the second embodiment and the second hybrid vehicle of the present invention, the catalyst deterioration suppression control and other controls (catalyst odor suppression control or normal fuel cut) are performed using the storage ratio SOC of the battery 50 and the charge / discharge current Ib. 7 is executed, and when a predetermined braking request is made, a request for catalyst deterioration suppression control is made and a temporary request for catalyst deterioration suppression control is made. When the priority order of the catalyst deterioration suppression control and the other control is the order of the catalyst deterioration suppression control and the other control, an execution command of the catalyst deterioration suppression control is transmitted to the engine ECU 24, and based on the required braking torque Tr *. The hybrid electronic control unit 7 that executes the predetermined braking request time control routine of FIG. 6 that sets the torque command Tm2 * of the motor MG2 and transmits it to the motor ECU 40. The engine ECU 24 that executes the catalyst deterioration suppression control when the execution command of the catalyst deterioration suppression control is received, and the motor ECU 40 that controls the motor MG2 based on the received torque command Tm2 * of the motor MG2 are “predetermined braking”. Corresponds to “on-demand control means”. In the relationship between the second embodiment and the fourth hybrid vehicle of the present invention, the priority order setting routine of FIG. 7 is used to set the priority order of the catalyst deterioration suppression control and other controls using the vehicle speed V and the integrated air amount Ga. When a predetermined braking request is made, the priority of the catalyst deterioration suppression control and other control is given priority when the main request for catalyst deterioration suppression control is made or when a temporary request for catalyst deterioration suppression control is made. In the order of suppression control and other controls, an execution command for catalyst deterioration suppression control is transmitted to the engine ECU 24, and a torque command Tm2 * for the motor MG2 is set based on the required braking torque Tr * and transmitted to the motor ECU 40. The hybrid electronic control unit 70 for executing the predetermined braking request control routine of FIG. 6 and the catalyst deterioration suppression control when the execution command for the catalyst deterioration suppression control is received. An engine ECU24 for row, a motor ECU40 controls the motor MG2 based on the torque command Tm2 * of the motor MG2 received, but corresponds to the "predetermined braking demand control unit". In the relationship between the second embodiment and the sixth hybrid vehicle of the present invention, the priority order of FIG. 7 in which the priority order of the catalyst deterioration suppression control and other control is set using the non-execution rate Rr of the catalyst deterioration suppression control. In addition to executing the setting routine, the priority of the catalyst deterioration suppression control and the other control is given when the request for the catalyst deterioration suppression control is made at the time of the predetermined braking request and when the temporary request for the catalyst deterioration suppression control is made. In the order of the catalyst deterioration suppression control and the other controls, an execution command for the catalyst deterioration suppression control is transmitted to the engine ECU 24, and the torque command Tm2 * of the motor MG2 is set based on the required braking torque Tr * to the motor ECU 40. The hybrid electronic control unit 70 that executes the predetermined braking request time control routine of FIG. 6 to be transmitted and the catalyst deterioration suppression control when the execution command of the catalyst deterioration suppression control is received. An engine ECU24 for execution, the motor ECU40 controls the motor MG2 based on the torque command Tm2 * of the motor MG2 received, but corresponds to the "predetermined braking demand control unit".

  Here, the “internal combustion engine” is not limited to an internal combustion engine that outputs power using a hydrocarbon-based fuel such as gasoline or light oil, but a purification device having a purification catalyst that purifies exhaust gas such as a hydrogen engine. Any type of internal combustion engine may be used as long as it is attached to the exhaust system and can output traveling power. The “motor” is not limited to the motor MG2 configured as a synchronous generator motor, and may be any type of motor as long as it can input and output driving power, such as an induction motor. . The “secondary battery” is not limited to the battery 50 configured as a lithium ion secondary battery, and can exchange electric power with an electric motor such as a nickel hydride secondary battery, a nickel cadmium secondary battery, or a lead storage battery. Any type of secondary battery may be used. The “predetermined braking request control means” is not limited to the combination of the hybrid electronic control unit 70, the engine ECU 24, and the motor ECU 40, and may be configured by a single electronic control unit.

  As the “predetermined braking request control means” in the first hybrid vehicle of the present invention, when the predetermined braking request is made, the catalyst temperature Tc is equal to or higher than the threshold Tcdref1, and the catalyst temperature Tc is lower than the threshold Tcdref1 and equal to or higher than the threshold Tcdref2. When the storage ratio SOC of the battery 50 is equal to or greater than the threshold value Sref and the battery 50 is being charged, catalyst deterioration suppression control is performed to control the engine 22 so that fuel injection is performed and the motor MG2 is requested. It is not limited to the control based on the torque command Tm2 * set based on the braking torque Tr *, but at the time of a predetermined braking request when the braking request is made while the internal combustion engine is running. The temperature of the purification catalyst is the lower limit of the temperature range where the promotion of deterioration of the purification catalyst is assumed. When the temperature is equal to or higher than the first predetermined temperature determined and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature that is lower than the first predetermined temperature and lower than the first predetermined temperature, and is stored in the secondary battery. When the power storage ratio, which is the ratio of the power storage amount to the total capacity, is greater than or equal to a predetermined power storage ratio, the catalyst deterioration suppression control is performed to control the internal combustion engine to be operated by fuel injection. Any method may be used as long as it performs regenerative drive control for controlling regenerative drive. As the “predetermined braking request control means” in the third hybrid vehicle of the present invention, when the predetermined braking request is made, the catalyst temperature Tc is equal to or higher than the threshold Tcdref1, and the catalyst temperature Tc is lower than the threshold Tcdref1 and equal to or higher than the threshold Tcdref2. When the vehicle speed V is equal to or higher than the threshold value Vref and the integrated air amount Ga is equal to or higher than the threshold value Gref, catalyst deterioration suppression control is performed to control the engine 22 to be operated by fuel injection, and the motor MG2 is required to perform braking. It is not limited to the control based on the torque command Tm2 * set based on the torque Tr *, and at the time of a predetermined braking request when the braking request is made while the internal combustion engine is running. The temperature of the purification catalyst is determined as the lower limit of the temperature range in which the promotion of deterioration of the purification catalyst is assumed. When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature that is lower than the first predetermined temperature and lower than the first predetermined temperature. In a temperature rising traveling state that is determined as a traveling state that is likely to rise above the first predetermined temperature, catalyst deterioration suppression control is performed to control the internal combustion engine so that fuel injection is performed and the motor is regenerated. Any method may be used as long as it performs regenerative drive control for controlling the drive. As the “predetermined braking request control means” in the fifth hybrid vehicle of the present invention, when the predetermined braking request is made, the catalyst temperature Tc is equal to or higher than the threshold Tcdref1, and the catalyst temperature Tc is lower than the threshold Tcdref1 and equal to or higher than the threshold Tcdref2. When the non-execution rate Rr of the catalyst deterioration suppression control is equal to or greater than the threshold value Rref, the catalyst deterioration suppression control is executed to control the engine 22 so that it is operated by fuel injection, and the motor MG2 is requested braking torque Tr *. The temperature of the purification catalyst is not limited to that controlled based on the torque command Tm2 * set on the basis of the temperature of the purification catalyst when a predetermined braking request is issued while the internal combustion engine is running. Than the first predetermined temperature defined as the lower limit of the temperature range in which the promotion of deterioration of the purification catalyst is assumed. When the temperature is equal to or higher than a second predetermined temperature set as a high temperature, it is determined that the execution request of the catalyst deterioration suppression control for controlling the internal combustion engine to perform the fuel injection is performed, and the temperature of the purification catalyst is When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature and the execution request for the catalyst deterioration suppression control is made, the catalyst deterioration suppression control is performed for the internal combustion engine. When the unexecuted degree, which is not executed, is greater than or equal to a predetermined level, the catalyst deterioration suppression control is executed for the internal combustion engine, and the regenerative drive control is executed for controlling the motor to be regeneratively driven. Anything can be used.

  As the “predetermined braking request control means” in the second hybrid vehicle of the present invention, the catalyst deterioration suppression control and other controls (catalyst odor suppression control or normal control using the storage ratio SOC and charge / discharge current Ib of the battery 50 are used. The priority order of the fuel cut control) is set, and when a predetermined braking request is made, when the catalyst degradation suppression control is actually requested and when the catalyst degradation suppression control is temporarily requested, the catalyst degradation suppression control and other controls are performed. Is the order of the catalyst deterioration suppression control and the other control order, the catalyst deterioration suppression control is executed to control the engine 22 so that the fuel is injected and operated, and the motor MG2 is requested braking torque. It is not limited to the one that is controlled based on the torque command Tm2 * that is set based on Tr *. At the time of the predetermined braking request when the braking request is made, the temperature of the purification catalyst is equal to or higher than a first predetermined temperature defined as the lower limit of the temperature range in which the promotion of deterioration of the purification catalyst is assumed, and the temperature of the purification catalyst is the first. A predetermined power storage ratio in which a power storage ratio that is lower than the first temperature and lower than the first predetermined temperature is equal to or higher than a second predetermined temperature and that is a ratio of the amount of power stored in the secondary battery to the total capacity. In the above-described case, the catalyst deterioration suppression control for controlling the internal combustion engine to be operated by performing the fuel injection is given priority over the catalyst odor suppression control for controlling the fuel injection to be stopped. Any method may be used as long as it performs regenerative drive control for controlling the drive. As the “predetermined braking request control means” in the fourth hybrid vehicle of the present invention, catalyst deterioration suppression control and other controls (catalyst odor suppression control or normal fuel cut control) using the vehicle speed V and the integrated air amount Ga. The priority order between the catalyst deterioration suppression control and other controls when the predetermined request for braking is made and when this request for the catalyst deterioration suppression control is made and when the temporary request for the catalyst deterioration suppression control is made Is in the order of the catalyst deterioration suppression control and the other control, the catalyst deterioration suppression control is executed to control the engine 22 so that the fuel injection is performed and the motor MG2 is based on the required braking torque Tr *. It is not limited to those controlled based on the torque command Tm2 * set in this way, but a braking request was made while the internal combustion engine was running. When the constant braking request is made, the temperature of the purification catalyst is equal to or higher than a first predetermined temperature defined as the lower limit of the temperature range in which the promotion of deterioration of the purification catalyst is assumed, and the temperature of the purification catalyst is less than the first predetermined temperature and the first When the current running state is equal to or higher than the second predetermined temperature set as a temperature lower than the predetermined temperature and the current running state is a temperature rising running state set as a running state in which the temperature of the purification catalyst is likely to rise above the first predetermined temperature, the internal combustion engine For the engine, the catalyst deterioration suppression control for controlling the fuel injection is operated in preference to the catalyst odor suppression control for controlling the fuel injection to be stopped, and the motor is controlled to be regeneratively driven. Any regenerative drive control may be used as long as it executes the regenerative drive control. As the “predetermined braking request control means” in the sixth hybrid vehicle of the present invention, the catalyst deterioration suppression control and other controls (catalyst odor suppression control or normal fuel cut) using the catalyst deterioration suppression control non-execution rate Rr. Control) and when a predetermined braking request is made, when the main request for catalyst deterioration suppression control is made and when a temporary request for catalyst deterioration suppression control is made, When the priority is in the order of the catalyst deterioration suppression control and the other control, the engine 22 is subjected to the catalyst deterioration suppression control for controlling the engine 22 to be operated by fuel injection, and the motor MG2 is required to provide the required braking torque Tr *. It is not limited to the control based on the torque command Tm2 * set on the basis of the torque command, and no braking request is made while the internal combustion engine is running. When the predetermined braking request is made, the internal combustion engine when the temperature of the purification catalyst is equal to or higher than a second predetermined temperature set as a temperature lower than a first predetermined temperature set as a lower limit of a temperature range in which promotion of deterioration of the purification catalyst is assumed. Is determined that the execution request of the catalyst deterioration suppression control for controlling the fuel injection is performed, and the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and the temperature of the purification catalyst is the first predetermined temperature. An unexecuted degree that is a level at which the catalyst deterioration suppression control is not executed for the internal combustion engine despite the fact that the temperature is lower than the temperature and is equal to or higher than the second predetermined temperature and the execution request for the catalyst deterioration suppression control is made. If it is above the level, the catalyst deterioration suppression control that controls the internal combustion engine so that the fuel injection is performed rather than the catalyst odor suppression control that controls the fuel injection to be stopped. Was preferentially performed, as long as to perform the regeneration drive control for controlling so as to be regenerated drive for motor may be used as any kind.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the manufacturing industry of hybrid vehicles.

  20, 20B, 120, 220, 320 Hybrid vehicle, 22 engine, 24 engine electronic control unit (engine ECU), 24a CPU, 24b ROM, 24c RAM, 26 crankshaft, 28 damper, 30 power distribution integration mechanism, 31 sun gear , 32 ring gear, 32a ring gear shaft, 33 pinion gear, 34 carrier, 35 reduction gear, 40 electronic control unit for motor (motor ECU), 41, 42 inverter, 43, 44 rotational position detection sensor, 50 battery, 51 temperature sensor, 52 Electronic control unit for battery (battery ECU), 54 power line, 60 gear mechanism, 62 differential gear, 63a, 63b drive wheel, 64a, 64b wheel, 70 hybrid electronic control unit, 72 CPU, 74 ROM, 76 RAM, 80 ignition switch, 81 shift lever, 82 shift position sensor, 83 accelerator pedal, 84 accelerator pedal position sensor, 85 brake pedal, 86 brake pedal position sensor, 88 vehicle speed sensor, 90 brake master cylinder, 92 Brake actuator, 94 Brake electronic control unit (brake ECU), 96a to 96d Brake wheel cylinder, 122 Air cleaner, 124 Throttle valve, 126 Fuel injection valve, 128 Intake valve, 130 Spark plug, 132 Piston, 134 Purification device, 135a Air-fuel ratio sensor, 135b Oxygen sensor, 136, Throttle motor, 138 Ignition coil, 140 Crank position Sensor, 142 water temperature sensor, 143 pressure sensor, 144 cam position sensor, 146 throttle valve position sensor, 148 air flow meter, 149 temperature sensor, 150 variable valve timing mechanism, 229 clutch, 230, 330 transmission, MG, MG1, MG2 motor .

Claims (17)

A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature that is lower than the first predetermined temperature and lower than the first predetermined temperature, and is stored in the secondary battery. When the power storage ratio, which is the ratio of the power storage amount to the total capacity, is equal to or greater than a predetermined power storage ratio, a catalyst deterioration suppression control is performed to control the internal combustion engine to be operated by fuel injection, and the electric motor About the predetermined braking request time control means for executing the regenerative drive control for controlling the regenerative drive,
A hybrid car with The hybrid vehicle according to claim 1,
The predetermined braking request time control means is configured such that when the temperature of the purification catalyst is lower than the first predetermined temperature and higher than or equal to the second predetermined temperature, the storage ratio of the secondary battery is higher than or equal to the predetermined storage ratio and the secondary battery. When the battery is charged, the internal combustion engine performs the catalyst deterioration suppression control, and the electric motor is a means for executing the regenerative drive control,
Hybrid car. A hybrid vehicle according to claim 1 or 2,
The predetermined braking request control means determines that the request for execution of the catalyst deterioration suppression control is made when the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is the first temperature. When it is determined that a provisional request for execution of the catalyst deterioration suppression control is made when the temperature is less than one predetermined temperature and above the second predetermined temperature, and when the main request for execution of the catalyst deterioration suppression control is made and the catalyst When a temporary request for execution of deterioration suppression control is made and the storage ratio of the secondary battery is equal to or greater than the predetermined storage ratio, the catalyst deterioration suppression control is executed for the internal combustion engine, and the regeneration is performed for the electric motor. Means for performing drive control;
Hybrid car. A hybrid vehicle according to any one of claims 1 to 3,
When the temperature of the purification catalyst is lower than the first predetermined temperature and greater than or equal to the second predetermined temperature, the current braking state is that the temperature of the purification catalyst is greater than or equal to the first predetermined temperature. In a temperature rising running state determined as a running state that tends to rise, the catalyst deterioration suppression control is executed for the internal combustion engine, and the regenerative drive control is executed for the electric motor, regardless of the storage ratio of the secondary battery. Is the means to perform,
Hybrid car. A hybrid vehicle according to claim 4,
The temperature increase traveling state is a traveling state in which the vehicle speed is equal to or higher than a predetermined vehicle speed and an integrated air amount that is an integrated value of the air amount supplied to the internal combustion engine is equal to or higher than a predetermined air amount. ,
Hybrid car. A hybrid vehicle according to any one of claims 1 to 5,
The predetermined braking request time control means determines that an execution request for the catalyst deterioration suppression control is made when the temperature of the purification catalyst is equal to or higher than the second predetermined temperature, and the temperature of the purification catalyst is determined to be the first predetermined temperature. When the temperature is lower than the second predetermined temperature and above the second predetermined temperature, an unexecuted degree is determined in advance, in which the catalyst deterioration suppression control is not executed even though the execution request for the catalyst deterioration suppression control is made. When not less than a predetermined level, regardless of the storage rate of the secondary battery, the catalyst deterioration suppression control is executed for the internal combustion engine, and the regenerative drive control is executed for the electric motor.
Hybrid car. The hybrid vehicle according to claim 6,
The unexecuted degree is at least one of the time, the ratio, and the number of times that the catalyst deterioration suppression control is not executed despite the execution request of the catalyst deterioration suppression control being made.
Hybrid car. A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and the temperature of the purification catalyst is equal to or higher than a second predetermined temperature that is lower than the first predetermined temperature and lower than the first predetermined temperature, and is stored in the secondary battery. When the power storage ratio, which is the ratio of the power storage amount to the total capacity, is greater than or equal to a predetermined power storage ratio, the internal combustion engine is operated by fuel injection rather than catalyst odor suppression control that controls the fuel injection to be stopped. Predetermined braking request control means for preferentially executing catalyst deterioration suppression control to be controlled and executing regenerative drive control for controlling the motor to be regeneratively driven,
A hybrid car with The hybrid vehicle according to claim 8,
The predetermined braking request time control means is configured such that the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature. When the catalyst odor generation condition where the generation of the catalyst odor of the catalyst is assumed is satisfied, and the storage ratio of the secondary battery is equal to or higher than the predetermined storage ratio, the catalyst deterioration suppression control is executed for the internal combustion engine. The motor is means for executing the regenerative drive control.
Hybrid car. A hybrid vehicle according to claim 8 or 9, wherein
The catalyst odor suppression control is a control for controlling the fuel injection to stop and increasing the amount of air supplied to the internal combustion engine.
Hybrid car. A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and higher than a second predetermined temperature set as a temperature lower than the first predetermined temperature, the current running state is Performing a catalyst deterioration suppression control for controlling the internal combustion engine to be operated by fuel injection when the temperature rise running state is set as a running state in which the temperature is likely to rise above the first predetermined temperature; Predetermined braking request time control means for executing regenerative drive control for controlling the motor to be regeneratively driven;
A hybrid car with The hybrid vehicle according to claim 11,
The predetermined braking request time control means determines that an execution request for the catalyst deterioration suppression control is made when the temperature of the purification catalyst is equal to or higher than the second predetermined temperature, and the temperature of the purification catalyst is determined to be the first predetermined temperature. When the temperature is lower than the second predetermined temperature and above the second predetermined temperature, an unexecuted degree is determined in advance, in which the catalyst deterioration suppression control is not executed even though the execution request for the catalyst deterioration suppression control is made. When the predetermined degree or more, regardless of the current running state, the catalyst deterioration suppression control is executed for the internal combustion engine, and the regenerative drive control is executed for the electric motor.
Hybrid car. A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
The temperature of the purification catalyst is set as the lower limit of the temperature range in which deterioration of the purification catalyst is assumed to be promoted when a predetermined braking request is made while the internal combustion engine is running while traveling. When the temperature is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and higher than a second predetermined temperature set as a temperature lower than the first predetermined temperature, the current running state is In a temperature rising running state determined as a running state in which the temperature is likely to rise above the first predetermined temperature, fuel injection is performed rather than catalyst odor suppression control for controlling the fuel injection to be stopped for the internal combustion engine. Priority is given to catalyst deterioration suppression control for controlling the motor to be operated, and for the electric motor, a control operation at the time of a predetermined braking request for executing regenerative drive control for controlling the motor to be regeneratively driven is performed. ,
A hybrid car with A hybrid vehicle according to claim 13,
The predetermined braking request time control means is configured such that the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature. When a catalyst odor generation condition where the generation of the catalyst odor of the catalyst is assumed is satisfied and the current traveling state is the temperature rising traveling state, the catalyst deterioration suppression control is executed for the internal combustion engine, and the electric motor Is a means for executing the regenerative drive control,
Hybrid car. A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
When the predetermined braking request is made while the internal combustion engine is running while the engine is running, the temperature of the purification catalyst is set as a lower limit of a temperature range in which promotion of deterioration of the purification catalyst is assumed. 1 When the internal combustion engine is at or above a second predetermined temperature set as a temperature lower than a predetermined temperature, it is determined that a request for execution of catalyst deterioration suppression control for controlling the internal combustion engine to be operated by fuel injection is made. When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, and the execution request for the catalyst deterioration suppression control is made. Nevertheless, the catalyst deterioration suppression control is executed for the internal combustion engine when the unexecuted level, which is the level at which the catalyst deterioration suppression control is not executed, is equal to or greater than a predetermined level. , Predetermined braking demand control means for performing the regenerative drive control for controlling so as to be regenerated drive for the electric motor,
A hybrid car with A purification device having a purification catalyst for purifying exhaust gas is attached to an exhaust system so that traveling power can be output, an electric motor capable of inputting and outputting traveling power, and electric power can be exchanged with the motor. A hybrid vehicle comprising a secondary battery,
When the predetermined braking request is made while the internal combustion engine is running while the engine is running, the temperature of the purification catalyst is set as a lower limit of a temperature range in which promotion of deterioration of the purification catalyst is assumed. 1 When the internal combustion engine is at or above a second predetermined temperature set as a temperature lower than a predetermined temperature, it is determined that a request for execution of catalyst deterioration suppression control for controlling the internal combustion engine to be operated by fuel injection is made. When the temperature of the purification catalyst is equal to or higher than the first predetermined temperature and when the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature, and the execution request for the catalyst deterioration suppression control is made. Nevertheless, when the non-executed level, which is the level at which the catalyst deterioration suppression control has not been executed, is equal to or greater than a predetermined level, the fuel injection is controlled to be stopped for the internal combustion engine. Predetermined braking request for performing catalyst deterioration suppression control for controlling operation so that fuel injection is performed over the catalyst odor suppression control for performing regenerative drive control for controlling the motor to be regeneratively driven Time control means,
A hybrid car with The hybrid vehicle according to claim 16, wherein
The predetermined braking request time control means is configured such that the temperature of the purification catalyst is equal to or higher than the first predetermined temperature, and the temperature of the purification catalyst is lower than the first predetermined temperature and equal to or higher than the second predetermined temperature. When the catalyst odor generation condition where the generation of the catalyst odor of the catalyst is assumed is satisfied, when the unexecuted level is equal to or greater than the predetermined level, the catalyst deterioration suppression control is executed for the internal combustion engine, and the electric motor is Is means for executing the regenerative drive control,
Hybrid car.

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